MORPHOLOGICAL AND ISOZYMAL VARIATION IN THE SEA-STAR ASTERIAS FORBESI(DESOR)

<p>Kinetic studies of the hydrogenation of carbon monoxide to methane and methanol were carried out over iron-titanium alloy catalysts, in a continuous flow fixed bed differential reactor. The catalysts studied included FeTi, Fe(,1.5)Ti and Fe(,2.5)Ti alloys with pure Fe used as a comparison. The catalysts used were all unsupported with an averaged initial particle size of 270 microns. The range of feed compositions was varied from 10 to 33% CO with the remainder being H(,2). Temperatures were varied from 520 to 590 K at a total pressure of 34 atm for all the catalysts studied. Additionally, a pressure of 13.6 atm was studied for the Fe(,1.5)Ti catalyst. Mass and heat transfer interferences were eliminated by limiting the catalyst contact time to 0.1 second.</p><p>The alloys studied generally had activities towards the methane and methanol reaction equivalent to pure iron while having a much better selectivity.</p><p>The Fe(,2.5)Ti catalyst had the greatest activity towards the methanation reaction, with a turnover number 150% larger than pure iron at 583 K, 34 atm and a feed of 33% CO with the remainder H(,2). The selectivity towards methane was in the range of 80 to 90% with the second major component being CO(,2). This catalyst did not deposit carbon and retained 85% of its original particle size.</p><p>Methanol was produced by the catalysts studied with the largest amounts produced by the Fe(,1.5)Ti catalyst at 583 K, 13.6 atm and a feed of 15% CO with the remainder being H(,2). Additionally, improved methanol production results were noted using Fe(,2.5)Ti as the system temperatures were reduced.</p>

Name thesis:degree_name

Doctor of Philosophy

Level thesis:degree_level

Dissertation

Year

1982

Author dc:creator

• TOWLE, CHARLES H, JR.

• Biology
• Genetics

Repository record dc:identifier

https://scholars.unh.edu/dissertation/1325

OAI identifier oai:identifier

oai:scholars.unh.edu:dissertation-2324